is you mp3/wav in the correct audio format? I'm pretty sure the engine only supports sampling rates of 11k and 22k. Also, I don't recall the keys used for sound offhand, but are you sure this is correct? The game probably throws some error message in game when you pass through the trigger, be sure to check for that in console. No error means I would bet the entity key is wrong.

is you mp3/wav in the correct audio format? I'm pretty sure the engine only supports sampling rates of 11k and 22k. Also, I don't recall the keys used for sound offhand, but are you sure this is correct? The game probably throws some error message in game when you pass through the trigger, be sure to check for that in console. No error means I would bet the entity key is wrong.

Well it doesn appear any error message in the console, i tried putting the command like this